1.. Permission is granted to copy, distribute and/or modify this
2.. document under the terms of the GNU Free Documentation License,
3.. Version 1.1 or any later version published by the Free Software
4.. Foundation, with no Invariant Sections, no Front-Cover Texts
5.. and no Back-Cover Texts. A copy of the license is included at
6.. Documentation/userspace-api/media/fdl-appendix.rst.
7..
8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
9
10.. _CA_GET_MSG:
11
12==========
13CA_GET_MSG
14==========
15
16Name
17----
18
19CA_GET_MSG
20
21
22Synopsis
23--------
24
25.. c:function:: int ioctl(fd, CA_GET_MSG, struct ca_msg *msg)
26    :name: CA_GET_MSG
27
28
29Arguments
30---------
31
32``fd``
33  File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`.
34
35``msg``
36  Pointer to struct :c:type:`ca_msg`.
37
38Description
39-----------
40
41Receives a message via a CI CA module.
42
43.. note::
44
45   Please notice that, on most drivers, this is done by reading from
46   the /dev/adapter?/ca? device node.
47
48
49Return Value
50------------
51
52
53On success 0 is returned.
54
55On error -1 is returned, and the ``errno`` variable is set
56appropriately.
57
58Generic error codes are described at the
59:ref:`Generic Error Codes <gen-errors>` chapter.
60